/* main.css - Demo 1: Neo-Minimalist */


/* --------------------
   RESET & BASIC SETUP
   -------------------- */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    /* font-size: 16px; Base font size */
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

/* --------------------
   CSS VARIABLES
   -------------------- */

:root {
    /* Light Theme (Default) */
    --color-background: #FFFFFF;
    --color-text-primary: #111111;
    --color-text-secondary: #555555;
    --color-accent: #008080; /* Deep Teal */
    --color-header-bg: rgba(255, 255, 255, 0.9);
    --color-card-bg: #F8F8F8;
    --color-border: #E0E0E0;

    /* Fonts */
    --font-heading: 'Inter', sans-serif; /* Example, replace with chosen font */
    --font-body: 'Inter', sans-serif;    /* Example, replace with chosen font */

    /* Spacing */
    --spacing-unit: 1rem; /* 16px */
    --container-width: 1100px;
    --header-height: 70px;
}

body[data-theme='dark'] {
    --color-background: #121212;
    --color-text-primary: #E0E0E0;
    --color-text-secondary: #AAAAAA;
    --color-accent: #32B8B8; /* Brighter Teal for dark mode */
    --color-header-bg: rgba(18, 18, 18, 0.9);
    --color-card-bg: #1E1E1E;
    --color-border: #333333;
}

/* --------------------
   UTILITIES
   -------------------- */

.container {
    
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);

}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover, a:focus {
    color: var(--color-text-primary);
}

/* --------------------
   HEADER & NAVIGATION
   -------------------- */

.site-header {
    background-color: var(--color-header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: calc(var(--spacing-unit) * 1) 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.5);
    font-weight: 700;
    color: var(--color-text-primary);
}

.main-nav ul {
    list-style: none;
    display: flex;
}

.main-nav li {
    margin-left: calc(var(--spacing-unit) * 1.5);
}

.main-nav a {
    font-family: var(--font-body);
    font-size: var(--spacing-unit);
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.main-nav a:hover::after, .main-nav a.active::after {
    width: 100%;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--color-text-primary);
}

.menu-toggle-button {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle-button svg {
    width: 24px;
    height: 24px;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
    padding: var(--spacing-unit) 0;
}

.mobile-nav ul {
    list-style: none;
    text-align: center;
}

.mobile-nav li {
    margin-bottom: var(--spacing-unit);
}

.mobile-nav a {
    font-family: var(--font-body);
    font-size: calc(var(--spacing-unit) * 1.1);
    color: var(--color-text-primary);
    padding: 0.5rem;
    display: block;
}

/* --------------------
   HERO SECTION
   -------------------- */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height);
    background-color: var(--color-background); /* Ensure it covers header space */
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem); /* Responsive font size */
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-unit);
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-size: var(--spacing-unit);
    font-weight: 600;
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    border-radius: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.cta-button:hover {
    background-color: var(--color-text-primary);
    color: var(--color-background);
    transform: translateY(-2px);
}




/* --------------------
   CONTENT SECTIONS
   -------------------- */

.content-section {
    padding: calc(var(--spacing-unit) * 4) 0;
    border-bottom: 1px solid var(--color-border);
}

.content-section:last-of-type {
    border-bottom: none;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: calc(var(--spacing-unit) * 0.5) auto 0;
}

/* About Section */
.about-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.profile-image-container {
    flex: 1 1 300px; /* Flex basis of 300px */
    max-width: 350px;
    margin: 0 auto;
}

.profile-image-container img {
    border-radius: 10px; /* Subtle rounding */
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.bio-text {
    flex: 2 1 400px; /* Flex basis of 400px */
}

.bio-text p {
    font-size: calc(var(--spacing-unit) * 1.1);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-unit);
}

/* Experience Section */
.experience-list .experience-item {
    background-color: var(--color-card-bg);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: 8px;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    border-left: 4px solid var(--color-accent);
}

.experience-item h3 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.25);
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.experience-item .experience-dates {
    font-size: calc(var(--spacing-unit) * 0.9);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    font-style: italic;
}

/* Skills Section */
.subsection-title {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.5);
    color: var(--color-text-primary);
    margin-top: calc(var(--spacing-unit) * 2);
    margin-bottom: var(--spacing-unit);
    text-align: center;
}

.skills-list, .languages-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-unit);
}

.skill-tag, .language-tag {
    background-color: var(--color-card-bg);
    color: var(--color-text-secondary);
    padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
    border-radius: 20px;
    font-size: calc(var(--spacing-unit) * 0.9);
    border: 1px solid var(--color-border);
    transition: background-color 0.3s, color 0.3s;
}

.skill-tag:hover, .language-tag:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

/* Projects Section */
.filter-buttons {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.filter-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
    margin: 0 calc(var(--spacing-unit) * 0.25);
    border-radius: 20px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

.project-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.project-item {
    background-color: var(--color-card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--color-border);
}

.project-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.project-item img {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
}

.project-info {
    padding: var(--spacing-unit);
}

.project-info h3 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.2);
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.project-info p {
    font-size: calc(var(--spacing-unit) * 0.9);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-unit);
}

.project-link {
    font-size: calc(var(--spacing-unit) * 0.9);
    font-weight: 600;
    text-transform: uppercase;
}

/* Contact Section */
.contact-intro {
    text-align: center;
    font-size: calc(var(--spacing-unit) * 1.1);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-details {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.contact-details p {
    font-size: calc(var(--spacing-unit) * 1.1);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.social-media-links {
    text-align: center;
}

.social-media-links a {
    margin: 0 calc(var(--spacing-unit) * 0.75);
    display: inline-block;
}

.social-media-links img {
    width: 28px; /* Adjust as needed */
    height: 28px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.social-media-links a:hover img {
    opacity: 1;
}

/* --------------------
   FOOTER
   -------------------- */

.site-footer {
    background-color: var(--color-card-bg);
    color: var(--color-text-secondary);
    padding: calc(var(--spacing-unit) * 2) 0;
    text-align: center;
    font-size: calc(var(--spacing-unit) * 0.9);
    border-top: 1px solid var(--color-border);
}

.site-footer p {
    margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.site-footer .attribution {
    font-size: calc(var(--spacing-unit) * 0.8);
    opacity: 0.7;
}

/* --------------------
   ANIMATIONS (GSAP will handle complex ones)
   -------------------- */

/* Basic fade-in for elements animated by GSAP to prevent flash of unstyled content if JS is slow */
/* .animate-on-load, .animate-on-scroll {
    opacity: 1;
} */

/* --------------------
   RESPONSIVE DESIGN
   -------------------- */

@media (max-width: 768px) {
    .main-nav {
        display: none; /* Hide desktop nav */
    }

    .menu-toggle-button {
        display: block; /* Show hamburger */
    }

    .mobile-nav.active {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
    }

    .profile-image-container {
        margin-bottom: var(--spacing-unit);
    }

    .project-gallery {
        grid-template-columns: 1fr; /* Single column on smaller screens */
    }
}